-----Original Message----- From: linuxbios-bounces@linuxbios.org [mailto:linuxbios-bounces@linuxbios.org] On Behalf Of ebiederm@xmission.com
Ok due to popular demands here is the slightly fixed patch that works on both i386 and x86_64. For the i386 version you must not have HIGHMEM64G enabled.
I just rolled it all into one patch as I'm to lazy to transmit all 3 of them.
I got
Firmware type: LinuxBIOS Linux version 2.6.19-smp-gc9976797-dirty (root@lbsrv) (gcc version 4.0.2) #196 6 Command line: earlyprintk=ttyS0,115200 apic=debug pci=noacpi,routeirq snd-hda-i BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 0000000000001000 (reserved) BIOS-e820: 0000000000001000 - 00000000000a0000 (usable) BIOS-e820: 00000000000c0000 - 00000000000f0000 (usable) BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) BIOS-e820: 0000000000100000 - 00000000c0000000 (usable) BIOS-e820: 0000000100000000 - 0000000240000000 (usable) dbgp_num: 0 Found EHCI debug port bar: 10 offset: 098 bar: 10 offset: 098 dbgp pre-set_fixmap_nocache PANIC: early exception rip ffffffff809c24b4 error 0 cr2 ffff810000203ff8
Call Trace: [<ffffffff809c24b4>] __set_fixmap+0x84/0x202 [<ffffffff809c05bb>] early_dbgp_init+0x259/0x55c [<ffffffff8022d958>] __call_console_drivers+0x64/0x72 [<ffffffff809b242b>] do_early_param+0x0/0x57 [<ffffffff809c0a20>] setup_early_printk+0x162/0x17e [<ffffffff809b2459>] do_early_param+0x2e/0x57 [<ffffffff8023d051>] parse_args+0x159/0x1f3 [<ffffffff809b24c2>] parse_early_param+0x40/0x4c [<ffffffff809b88ca>] setup_arch+0x1c1/0x636 [<ffffffff809b2534>] start_kernel+0x55/0x208 [<ffffffff809b2173>] _sinittext+0x173/0x177
RIP __set_fixmap+0x84/0x202
With Greg's USB Debug, host and target can talk. target with console=ttyUSB0,115200n8 host with cat /dev/ttyUSB0 But if use minicom in host, it will not show '\r', I guess the usb debug cable eat return char. Greg, Can you add that back in usb_debug by replacing '\n' with '\r', '\n'?
With Eric code in LinuxBIOS, it will report "No device found in debug port"
YH